I just purchased a Fiio E7. I haven't received it yet but I plan to use it mostly with my computer. My question is, is it ok to just leave it plugged into the USB from the computer all the time? I only turn my computer off at night so it would be plugged in all day. Will this affect the battery life later on because its constantly charging? Or does it have the thing that phones have that protect it from overcharging? FiiO didn't have anything on their website since they have a newer model of the E7 so I thought I'd ask here.